lacking an aerial stem or trunk. cf. caulescent.
stiff and needle-like.
an adult lamina on the high-climbing portions of some ferns in Lomariopsis and related genera. cf. bathyphyll.
pointing towards the apex. cf. basiscopic.
gradually tapering to a protracted point.
terminating in a distinct but not protracted point, the converging edges separated by an angle less than 90°.
fused to an organ of a different kind.
a localised outgrowth associated with ventilation, as in Cyathea.
winged.
bearing stomata on both upper and lower lamina surfaces. cf. hypostomatic.
a type of venation in which the first set of veins in each segment of the frond originates from the acroscopic side of the midrib, as in Polystichum australiense. cf. catadromous.
of veins, forming a network or reticulum.
having leaves unequal in size and shape at any one point along a branch. cf. isophyllous.
dichotomies resulting in unequal branching. cf. isotomous.
when the two valves of a sporangium are unequal in size. cf. isovalvate.
arranged in or forming a ring.
the elastic ring of cells in a sporangium that initiates dehiscence.
the fertile organ of a male gametophyte or the male organ of a bisexual gametophyte, in which the male gametes are formed. pl. antheridia.
applied to pteridophytes in which a sporophyte develops from gametophyte cells, other than a fertilised egg.
a plant that produces viable spores without fertilisation.
pressed closely against a surface (or another organ) but not united with it.
composed of fine tangled hairs like a cobweb.
resembling a tree in height.
the structure that produces the female gamete or egg. pl. archegonia.
jointed
rough to the touch.
of pinnae, with sides narrowed concavely to the apex or to the base.
pointing towards the base. cf. acroscopic.
of spores, with two different elements in the ornamentation, which cover the entire surface, as in the spores of some species of Pyrrosia.
a pit (q.v.) in which the margin projects over the thin closing membrane, as in coniferous wood.
a short lateral branch.
bearing bulbils.
having a blistered or puckered surface.
shed easily.
hard and tough, resembling cartilage.
a type of venation in which the first set of veins in each segment of the frond develops from the basiscopic side of the midrib, as in Lastreopsis marginans and L. tenera. cf. anadromous.
united or linked as in a chain.
a narrow tail-like appendage. adj. caudate.
a thick erect stock or trunk, especially of tree ferns.
developing an aerial stem or trunk. cf. acaulescent.
the basic unit of plant structure consisting, at least when young, of a protoplast surrounded by a wall.
thin and papery.
pigment(s) constituting the green colouring matter of plants and absorbing radiant energy in photosynthesis. adj. chlorophyllous.
fringed with hairs.
coiled in a spiral with the tip innermost.
latticed or pierced with apertures like a trellis.
club-shaped.
fused sori.
a juncture or seam
of a leaf, having the blade divided into two or more distinct leaflets.
coloured uniformly
folded flat together lengthwise
a group of sporophylls arranged compactly on a central axis.
of a leaf blade, broad and notched at the base
leathery.
in Isoetes, the condensed stem, which may be 2–5-lobed.
with small, rounded teeth
minutely scalloped.
in ferns, having a tasselled margin to the fronds.
mode of germination in which cotyledons remain enclosed within the seed.
articulated hairs with dark red septae, as in Ctenitis, Lastreopsis and allied genera (Dryopteridaceae).
cup-shaped.
cup-like.
boat-shaped
shed seasonally.
gradually decreasing in size, e.g. lower pinnae of Christella species.
borne in pairs alternately at right angles to each other.
bent abruptly downwards.
triangular with the sides of about equal length.
of margins, toothed.
finely toothed.
divided into two approximately equal branches resulting from the division of a growing point.
a stele (q.v.) with large overlapping leaf gaps.
halved, as when half of an organ is so much smaller than the other half that it seems absent. In Adiantum, applied to pinnules in which the basiscopic lamina is reduced. The pinnule therefore appears ±rectangular or trapeziform rather than flabellate.
having two different forms, especially of fronds. cf. monomorphic.
having the male and female reproductive structures on separate plants. cf. monoecious.
of different colours
of a lateral organ, facing away from the axis.
attached by or at the back.
having structurally different upper and lower surfaces.
without glands.
having a broad shallow apical notch.
sword-shaped.
having a smooth margin, not dissected or toothed.
expanded fleshy seed-bearing bract scale in certain conifers, especially some Podocarpaceae.
a plant growing on (but not parasitic on) another plant.
having sporangia with walls more than one cell thick. cf. leptosporangiate.
lacking an indusium.
sickle-shaped.
rows of thickened cells in a leaf/leaflet which are not part of the vascular system, as in some genera of the Hymenophyllaceae.
with extensive lateral branching and no clear single leading branch.
pierced with small window-like openings.
rust-coloured.
of a margin, fringed with fine hairs.
fan-shaped.
covered with soft tangled woolly hairs.
a distinct raised ring around stomatal openings of Podocarpus, formed by raised subsidiary cells that are differentiated from other epidermal cells.
shed or withering away very early.
dusky.
a plant or generation that bears gametes during the sexual life cycle.
bearing asexual buds or bulbils.
becoming glabrous.
without hairs or scales.
a structure with a secretory function, embedded or projecting from the surface of the plant.
dull green with a bluish white or white lustre.
almost spherical.
a seed plant with the ovules borne on the surface of a sporophyll.
spear-shaped
branching repeatedly on the same side. In Adiantum, applied to anadromous fronds in which basal basiscopic pinnae are well-developed (i.e. pinnate), but corresponding acroscopic pinnae are reduced to simple pinnules. The stipe thus appears to branch dichotomously into two helically curved rachises, with pinnate pinnae apparently arising from their upper sides.
a plant which obtains its nutriment partly from dead organic matter and partly from photosynthesis.
soft in texture
with two or more distinct kinds of shoot. cf. homoblastic.
having leaves that are not uniform along a branch, e.g. in Huperzia, with long leaves in the lower portions and smaller reduced leaves distally. cf. homophyllous.
producing two kinds of spores (male and female, or microspores and megaspores). cf. homosporous.
clothed with short stiff hairs or bristles.
a plant which obtains its nutriment entirely from dead organic matter.
with one kind of shoot. cf. heteroblastic.
with all leaves uniform along a branch. cf. heterophyllous.
producing only one type of spore from which develops a gametophyte producing both male and female gametes. cf. heterosporous.
translucent, almost like clear glass.
water- or mineral-excreting pores at the ends of some veins, e.g. in Grammitidaceae and some Davalliaceae.
bearing stomata on one leaf surface only, usually the lower or abaxial surface. cf. amphistomatic.
cut deeply, sharply and often irregularly (an intermediate condition between toothed and lobed).
bent or curved inwards or upwards
the epidermal appendages, e.g. hairs or scales, collectively.
hardened.
in leaves of Isoetes, projections into the lacunae.
leaves equal in size and shape at any point on the branch. cf. anisophyllous.
having all dichotomies resulting in equally thin branches. cf. anisotomous.
having the two valves of a sporangium equal in size. cf. anisovalvate.
an outgrowth above the sporangium which partially or wholly covers the ligule.
of Isoetes, a cavity within the leaves. pl. lacunae.
a ridge which surrounds the apertural slit (through which the gemetophyte germinates) in spores of Polypodiophyta
woolly.
having sporangia with the walls only one cell thick. cf. eusporangiate.
a membranous structure towards the base of the upper leaf surface in Isoetes and Selaginella.
growing on rock.
crescent-shaped.
having secondary wood of a loose texture with discontinuous xylem and a large proportion of included parenchyma.
withering without falling off.
group of microspores enclosed in a hardened mucilage. pl. massulae.
a protostele in which the xylem has a core of non-vascular tissue.
the larger of the two kinds of sporangia produced in the sexual life cycle of a heterosporous plant. Produces megaspores.
the larger of the two kinds of spores produced in the sexual life cycle of a heterosporous plant, giving rise to the female gametophyte. They may be monomorphic as in Selaginella, or polymorphic as in some Isoetes species. cf. microspore.
a sporocarp containing megasporangia.
a specialised leaf upon which (or in the axil of which) one or more megasporangia are borne.
photosynthetic tissue of a green leaf.
the smaller of the two kinds of sporangia produced in the sexual life cycle of a heterosporous plant.
the smaller of the two kinds of spores produced in the sexual life cycle of a heterosporous plant, giving rise to the male gametophyte. cf. megaspore.
a sporocarp containing microsporangia.
having the male and female reproductive parts in separate organs but on the same plant. cf. dioecious.
of uniform shape and size. cf. dimorphic.
a type of spore with a single germination pore or furrow.
a sharp abrupt terminal point. adj. mucronate.
having a very small mucro
low ridges.
covered with short hard-pointed outgrowths.
specialised shield-like basal fronds in some ferns (e.g. Platycerium) which accumulate leaf litter.
a prefix signifying the opposite of.
blunt or rounded at the apex, the converging edges separated by an angle greater than 90°.
arranged in regular vertical rows on a stem or axis.
mode of growth of vertical branches or leading shoots, especially in conifers where lateral (plagiotropic) branches may have different morphology.
thick-stemmed, sparingly branched and succulent, with a massive parenchymatous pith and cortex and relatively little secondary wood.
clothed with scales.
of a leaf, divided into several leaflets which arise at the same point. cf. palmatifid, pinnatifid.
of a leaf, deeply (but not completely) divided into several lobes which arise (almost) at the same level. cf. palmate, pinnatifid.
a small elongated protuberance on the surface of an organ, usually an extension of one epidermal cell. adj. papillose.
sterile filaments occurring among the sporangia of some ferns. pl. paraphyses.
plant tissue consisting of mature living cells that are relatively unspecialised in function.
comb-like.
the stalk of a sporangium.
having the stalk attached to the lower surface usually at or near the centre
multicellular fibre strands which strengthen the periphery of the leaf in some Isoetes species.
the folded membrane of most spores, forming an ornamental external covering.
remaining attached to the plant beyond the expected time of falling.
mode of germination where cotyledons emerge from the seed and above ground.
an outgrowth from the stem to which a stipe is articulated.
hairy, the hairs soft and clearly separated but not sparse.
cut deeply (but not to midrib) into lobes that are spaced out along the axis. cf. palmate, palmatifid.
pinnately dissected down to the midrib but having the segments confluent with it.
mode of growth of lateral branches, growing horizontally away from the leading shoot and maintaining a different morphology, especially in conifers.
describing flat and bilaterally symmetrical seeds.
having many cells, as in some hairs.
having more than two distinct morphological variants.
having adventitious leaf buds which produce new plants.
the gametophyte of a fern or fern ally.
false
pattern of folding and rolling shown during leaf development.
clothed with short soft erect hairs.
marked with dots, depressions or translucent glands.
pear-shaped.
squarish.
applied to a rootstock in which the fronds radiate and the roots are borne on all sides of the organ.
describing radially symmetrical seeds.
of ferns, the axis bearing the sporangia and sometimes also paraphyses.
curved or curled downwards or backwards.
bent sharply downwards or backwards.
kidney-shaped.
a network, e.g. of veins. adj. reticulate.
a thread-like unicellular absorbing structure occurring, in the vascular plants, in gametophytes of ferns and some related plants.
the creeping (often underground) or climbing stem of a fern.
in Selaginella, a leafless stem that produces roots.
diamond-shaped or almost so.
a swollen root together with the whole or a portion of a very short stem.
deeply wrinkled.
covered with minute wrinkles.
with pouched projections.
an organism living on dead organic matter and usually lacking chlorophyll.
the fleshy outer layer of the seed coat in cycads.
slightly or minutely rough to the touch.
rough.
a thin flap of tissue of epidermal origin
climbing.
divided internally by septa.
a partition. pl. septa.
clothed with silky hairs.
toothed, like a saw blade.
lacking a stalk.
producing or having setae.
covered with bristles.
undivided
the membrane of a depression between adjacent lobes in a pinna, especially in the Thelypteridaceae.
a shoot originating near the ground.
a tubular stele with both external and internal phloem.
the specialised fertile lobe unique to Adiantum.
a cluster of sporangia. pl. sori.
spoon-shaped
with small spines.
bearing spores.
the stalk of a sporangium.
a structure within which spores are formed. pl. sporangia.
a unicellular or few-celled sexual or asexual reproductive propagule.
a fruiting body containing sporangia.
a specialised leaf-like organ that bears one or more sporangia.
a plant or phase that bears the spores formed during the sexual reproductive cycle.
with spreading and divergent scales or processes.
star-shaped.
the region of a sporangium at which dehiscence occurs and the spores are released.
straw-coloured, pale yellow.
with stiff sharp slanting hairs, hair-like scales or bristles.
a cone-like body, as in the Lycopodiaceae and Selaginellaceae, consisting of sporophylls borne close together on the axis. pl. strobili.
narrow and tapering gradually to a fine point.
grooved
structure formed by the fusion of sporangia, e.g. in Psilotum, Marattia. pl. synangia.
circular or almost so in cross section.
in groups of three.
testicle-like.
a group of four.
having four sides.
having four of the basis sets of chromosomes in a nucleus.
arranged in four regular vertical rows, but not necessarily decussate.
a hairy covering of short closely matted hairs. adj. tomentose.
a plate two or three cells in thickness, perforated by pores, in the leaves of Isoetes.
of spores, with a three-pronged scar.
arranged in whorls of three.
having three of the basic sets of chromosomes in the nucleus.
triangular in cross section and acutely angled.
with an abruptly transverse end, as if cut off.
a small wart-like outgrowth.
covered with tubercles.
urn-shaped.
the primary fluid-conducting system of a plant.
a strand of vascular tissue.
a membranous flap-like envelope which partially or wholly covers the sporangium.
with worm-like projections.
the arrangement of the unexpanded fronds in a bud.
covered with wart-like outgrowths, warted.
the tissue, in a vascular plant, that conducts water and mineral salts from the roots to the leaves.
Field AR, Quinn CJ, Zich FA (2022) Australian Tropical Ferns and Lycophytes. apps.lucidcentral.org/fern/text/intro/index.htm (accessed online INSERT DATE).
Field AR, Quinn CJ, Zich FA (2022) ‘Platycerium superbum’, in Australian Tropical Ferns and Lycophytes. apps.lucidcentral.org/fern/text/entities/platycerium_superbum.htm (accessed online INSERT DATE).
